Characteristics
What do we call a group of the same type of animals living in the same place?
A population.
What shape shows how bacteria grow quickly?
J-shaped graph.
What do we call the study of human populations?
Demography
What are resources called that can be replaced?
Renewable resources.
What does biodiversity mean?
Variety of organisms in an area.
What is it called when there are many animals in one area?
Population density.
What happens to the population growth rate when there are fewer resources?
It slows down or stops (logical growth).
What human activity can cause extinction of animals?
Hunting and gathering.
What is an example of a nonrenewable resource?
Fossil fuels.
Why is biodiversity important for ecosystems?
It helps species survive together.
What happens to a population if there is a lot of food and space?
It grows a lot (exponentially).
How do we measure population growth?
Birthrate minus death rate.
What was one effect of the Industrial Revolution?
Increased pollution.
What happens when we overuse resources?
They can become limited.
What is habitat fragmentation?
When land development breaks habitats into smaller pieces.
What is one factor that can stop a population from growing?
Lack of resources (like food or water).
What is it called when animals compete for food?
Competition
What is a problem caused by urban development?
Stress on plants and animals.
What is one way to reduce soil erosion?
Contour plowing.
What is one threat to biodiversity?
Pollution
What do we call the maximum number of animals that can live in a space?
Carrying capacity.
How do predators help control populations?
By eating other animals (predation).
How can we help our environment when using resources?
Sustainable development.
What kind of fishery problem happens when too many fish are caught?
Overfishing
What is a way to help endangered species?
Reintroduction programs.